Polygonaceae
Polygonum
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Polygonum articulatum L.
= Polygonella articulata
(L.) Meisner
coastal jointed knotweed, jointweed
Native
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Polygonum aviculare L. ssp. aviculare
common knotweed, dooryard knotweed, doorweed
Introduced
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Polygonum aviculare ssp. depressum (Meisner) Arcangeli
mat-forming common knotweed
Introduced
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Polygonum aviculare ssp. neglectum (Besser) Arcangeli
= Polygonum aviculare ssp. rectum
Chrtek
= Polygonum neglectum
Besser
narrow-leaved common knotweed
Introduced
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Polygonum aviculare ssp. rurivagum (Jordan ex Boreau) Berher
= Polygonum rurivagum
Jord. ex Boreau
fibrous-veined common knotweed
Introduced
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Polygonum buxiforme Small
= Polygonum aviculare var. littorale
(Link) Mack. & Bush
boxleaf knotweed, box knotweed
Native
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Polygonum glaucum Nutt.
= Polygonum maritimum
auct. non L.
seaside knotweed
Native
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Special Concern
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Polygonum ramosissimum ssp. prolificum (Small) Costea & Tardif
= Polygonum prolificum
(Small) Robinson
productive yellow-flowered knotweed, productive saltmarsh knotweed
Native
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Polygonum tenue Michx.
slender knotweed, rock knotweed
Native
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Watch-Listed
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